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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
15b7b062 | 36 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 37 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 38 | |
5484e237 JB |
39 | /* utils */ |
40 | static int ecw2cw(int ecw) | |
60f8b39c | 41 | { |
5484e237 | 42 | return (1 << ecw) - 1; |
60f8b39c JB |
43 | } |
44 | ||
c2b13452 | 45 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
46 | { |
47 | u8 *end, *pos; | |
48 | ||
00d3f14c | 49 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
50 | if (pos == NULL) |
51 | return NULL; | |
00d3f14c | 52 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
53 | |
54 | while (pos + 1 < end) { | |
55 | if (pos + 2 + pos[1] > end) | |
56 | break; | |
57 | if (pos[0] == ie) | |
58 | return pos; | |
59 | pos += 2 + pos[1]; | |
60 | } | |
61 | ||
62 | return NULL; | |
63 | } | |
64 | ||
c2b13452 | 65 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 66 | struct ieee80211_supported_band *sband, |
881d948c | 67 | u32 *rates) |
9ac19a90 JB |
68 | { |
69 | int i, j, count; | |
70 | *rates = 0; | |
71 | count = 0; | |
72 | for (i = 0; i < bss->supp_rates_len; i++) { | |
73 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
74 | ||
75 | for (j = 0; j < sband->n_bitrates; j++) | |
76 | if (sband->bitrates[j].bitrate == rate) { | |
77 | *rates |= BIT(j); | |
78 | count++; | |
79 | break; | |
80 | } | |
81 | } | |
82 | ||
83 | return count; | |
84 | } | |
85 | ||
d5522e03 JB |
86 | /* |
87 | * ieee80211_enable_ht should be called only after the operating band | |
88 | * has been determined as ht configuration depends on the hw's | |
89 | * HT abilities for a specific band. | |
90 | */ | |
91 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
92 | struct ieee80211_ht_info *hti, | |
93 | u16 ap_ht_cap_flags) | |
94 | { | |
95 | struct ieee80211_local *local = sdata->local; | |
96 | struct ieee80211_supported_band *sband; | |
97 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
98 | struct ieee80211_bss_ht_conf ht; | |
99 | struct sta_info *sta; | |
100 | u32 changed = 0; | |
101 | bool enable_ht = true, ht_changed; | |
102 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
103 | ||
104 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
105 | ||
106 | memset(&ht, 0, sizeof(ht)); | |
107 | ||
108 | /* HT is not supported */ | |
109 | if (!sband->ht_cap.ht_supported) | |
110 | enable_ht = false; | |
111 | ||
112 | /* check that channel matches the right operating channel */ | |
113 | if (local->hw.conf.channel->center_freq != | |
114 | ieee80211_channel_to_frequency(hti->control_chan)) | |
115 | enable_ht = false; | |
116 | ||
117 | if (enable_ht) { | |
118 | channel_type = NL80211_CHAN_HT20; | |
119 | ||
120 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
121 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
122 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
123 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
124 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
125 | channel_type = NL80211_CHAN_HT40PLUS; | |
126 | break; | |
127 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
128 | channel_type = NL80211_CHAN_HT40MINUS; | |
129 | break; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
135 | channel_type != local->hw.conf.channel_type; | |
136 | ||
137 | local->oper_channel_type = channel_type; | |
138 | ||
139 | if (ht_changed) { | |
140 | /* channel_type change automatically detected */ | |
141 | ieee80211_hw_config(local, 0); | |
142 | ||
143 | rcu_read_lock(); | |
144 | ||
145 | sta = sta_info_get(local, ifmgd->bssid); | |
146 | if (sta) | |
147 | rate_control_rate_update(local, sband, sta, | |
148 | IEEE80211_RC_HT_CHANGED); | |
149 | ||
150 | rcu_read_unlock(); | |
151 | ||
152 | } | |
153 | ||
154 | /* disable HT */ | |
155 | if (!enable_ht) | |
156 | return 0; | |
157 | ||
158 | ht.operation_mode = le16_to_cpu(hti->operation_mode); | |
159 | ||
160 | /* if bss configuration changed store the new one */ | |
161 | if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { | |
162 | changed |= BSS_CHANGED_HT; | |
163 | sdata->vif.bss_conf.ht = ht; | |
164 | } | |
165 | ||
166 | return changed; | |
167 | } | |
168 | ||
9c6bd790 JB |
169 | /* frame sending functions */ |
170 | ||
46900298 | 171 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 172 | { |
46900298 | 173 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
174 | struct ieee80211_local *local = sdata->local; |
175 | struct sk_buff *skb; | |
176 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 177 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
178 | int i, len, count, rates_len, supp_rates_len; |
179 | u16 capab; | |
c2b13452 | 180 | struct ieee80211_bss *bss; |
9ac19a90 JB |
181 | int wmm = 0; |
182 | struct ieee80211_supported_band *sband; | |
881d948c | 183 | u32 rates = 0; |
9ac19a90 JB |
184 | |
185 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 186 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 187 | ifmgd->ssid_len); |
9ac19a90 JB |
188 | if (!skb) { |
189 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
190 | "frame\n", sdata->dev->name); | |
191 | return; | |
192 | } | |
193 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
194 | ||
195 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
196 | ||
46900298 | 197 | capab = ifmgd->capab; |
9ac19a90 JB |
198 | |
199 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
200 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
201 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
202 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
203 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
204 | } | |
205 | ||
46900298 | 206 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 207 | local->hw.conf.channel->center_freq, |
46900298 | 208 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 209 | if (bss) { |
00d3f14c | 210 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
211 | capab |= WLAN_CAPABILITY_PRIVACY; |
212 | if (bss->wmm_used) | |
213 | wmm = 1; | |
214 | ||
215 | /* get all rates supported by the device and the AP as | |
216 | * some APs don't like getting a superset of their rates | |
217 | * in the association request (e.g. D-Link DAP 1353 in | |
218 | * b-only mode) */ | |
219 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
220 | ||
00d3f14c | 221 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
222 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
223 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
224 | ||
225 | ieee80211_rx_bss_put(local, bss); | |
226 | } else { | |
227 | rates = ~0; | |
228 | rates_len = sband->n_bitrates; | |
229 | } | |
230 | ||
231 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
232 | memset(mgmt, 0, 24); | |
46900298 | 233 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 234 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 235 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 236 | |
46900298 | 237 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
238 | skb_put(skb, 10); |
239 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
240 | IEEE80211_STYPE_REASSOC_REQ); | |
241 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
242 | mgmt->u.reassoc_req.listen_interval = | |
243 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 244 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
245 | ETH_ALEN); |
246 | } else { | |
247 | skb_put(skb, 4); | |
248 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
249 | IEEE80211_STYPE_ASSOC_REQ); | |
250 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 251 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
252 | cpu_to_le16(local->hw.conf.listen_interval); |
253 | } | |
254 | ||
255 | /* SSID */ | |
46900298 | 256 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 257 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
258 | *pos++ = ifmgd->ssid_len; |
259 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
260 | |
261 | /* add all rates which were marked to be used above */ | |
262 | supp_rates_len = rates_len; | |
263 | if (supp_rates_len > 8) | |
264 | supp_rates_len = 8; | |
265 | ||
266 | len = sband->n_bitrates; | |
267 | pos = skb_put(skb, supp_rates_len + 2); | |
268 | *pos++ = WLAN_EID_SUPP_RATES; | |
269 | *pos++ = supp_rates_len; | |
270 | ||
271 | count = 0; | |
272 | for (i = 0; i < sband->n_bitrates; i++) { | |
273 | if (BIT(i) & rates) { | |
274 | int rate = sband->bitrates[i].bitrate; | |
275 | *pos++ = (u8) (rate / 5); | |
276 | if (++count == 8) | |
277 | break; | |
278 | } | |
279 | } | |
280 | ||
281 | if (rates_len > count) { | |
282 | pos = skb_put(skb, rates_len - count + 2); | |
283 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
284 | *pos++ = rates_len - count; | |
285 | ||
286 | for (i++; i < sband->n_bitrates; i++) { | |
287 | if (BIT(i) & rates) { | |
288 | int rate = sband->bitrates[i].bitrate; | |
289 | *pos++ = (u8) (rate / 5); | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
295 | /* 1. power capabilities */ | |
296 | pos = skb_put(skb, 4); | |
297 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
298 | *pos++ = 2; | |
299 | *pos++ = 0; /* min tx power */ | |
300 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
301 | ||
302 | /* 2. supported channels */ | |
303 | /* TODO: get this in reg domain format */ | |
304 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
305 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
306 | *pos++ = 2 * sband->n_channels; | |
307 | for (i = 0; i < sband->n_channels; i++) { | |
308 | *pos++ = ieee80211_frequency_to_channel( | |
309 | sband->channels[i].center_freq); | |
310 | *pos++ = 1; /* one channel in the subband*/ | |
311 | } | |
312 | } | |
313 | ||
46900298 JB |
314 | if (ifmgd->extra_ie) { |
315 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
316 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
317 | } |
318 | ||
46900298 | 319 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
320 | pos = skb_put(skb, 9); |
321 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
322 | *pos++ = 7; /* len */ | |
323 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
324 | *pos++ = 0x50; | |
325 | *pos++ = 0xf2; | |
326 | *pos++ = 2; /* WME */ | |
327 | *pos++ = 0; /* WME info */ | |
328 | *pos++ = 1; /* WME ver */ | |
329 | *pos++ = 0; | |
330 | } | |
331 | ||
332 | /* wmm support is a must to HT */ | |
eb46936b VT |
333 | /* |
334 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
335 | * ciphers in HT mode. We still associate in non-ht | |
336 | * mode (11a/b/g) if any one of these ciphers is | |
337 | * configured as pairwise. | |
338 | */ | |
46900298 | 339 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
340 | sband->ht_cap.ht_supported && |
341 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 342 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 343 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
344 | struct ieee80211_ht_info *ht_info = |
345 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
346 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
347 | __le16 tmp; |
348 | u32 flags = local->hw.conf.channel->flags; | |
349 | ||
d9fe60de JB |
350 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
351 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 352 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 353 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
354 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
355 | } | |
356 | break; | |
d9fe60de | 357 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 358 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 359 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
360 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
361 | } | |
362 | break; | |
363 | } | |
364 | ||
365 | tmp = cpu_to_le16(cap); | |
366 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
367 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
368 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
369 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
370 | memcpy(pos, &tmp, sizeof(u16)); | |
371 | pos += sizeof(u16); | |
372 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
373 | *pos++ = sband->ht_cap.ampdu_factor | |
374 | (sband->ht_cap.ampdu_density << 2); | |
375 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
376 | } |
377 | ||
46900298 JB |
378 | kfree(ifmgd->assocreq_ies); |
379 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
380 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
381 | if (ifmgd->assocreq_ies) | |
382 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 383 | |
e50db65c | 384 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
385 | } |
386 | ||
387 | ||
ef422bc0 JB |
388 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
389 | u16 stype, u16 reason) | |
9ac19a90 JB |
390 | { |
391 | struct ieee80211_local *local = sdata->local; | |
46900298 | 392 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
393 | struct sk_buff *skb; |
394 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 395 | |
65fc73ac | 396 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 397 | if (!skb) { |
ef422bc0 JB |
398 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
399 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
400 | return; |
401 | } | |
402 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
403 | ||
404 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
405 | memset(mgmt, 0, 24); | |
46900298 | 406 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 407 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 408 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 409 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 410 | skb_put(skb, 2); |
ef422bc0 | 411 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
412 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
413 | ||
53b46b84 JM |
414 | if (stype == IEEE80211_STYPE_DEAUTH) |
415 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
416 | else | |
417 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 418 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
419 | } |
420 | ||
572e0012 KV |
421 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
422 | struct ieee80211_sub_if_data *sdata) | |
423 | { | |
46900298 | 424 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
425 | struct ieee80211_pspoll *pspoll; |
426 | struct sk_buff *skb; | |
427 | u16 fc; | |
428 | ||
429 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
430 | if (!skb) { | |
431 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
432 | "pspoll frame\n", sdata->dev->name); | |
433 | return; | |
434 | } | |
435 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
436 | ||
437 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
438 | memset(pspoll, 0, sizeof(*pspoll)); | |
439 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
440 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 441 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
442 | |
443 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
444 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
445 | ||
46900298 | 446 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
447 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
448 | ||
449 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
450 | } |
451 | ||
965bedad JB |
452 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
453 | struct ieee80211_sub_if_data *sdata, | |
454 | int powersave) | |
455 | { | |
456 | struct sk_buff *skb; | |
457 | struct ieee80211_hdr *nullfunc; | |
458 | __le16 fc; | |
459 | ||
460 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
461 | return; | |
462 | ||
463 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
464 | if (!skb) { | |
465 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
466 | "frame\n", sdata->dev->name); | |
467 | return; | |
468 | } | |
469 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
470 | ||
471 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
472 | memset(nullfunc, 0, 24); | |
473 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
474 | IEEE80211_FCTL_TODS); | |
475 | if (powersave) | |
476 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
477 | nullfunc->frame_control = fc; | |
478 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
479 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
480 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
481 | ||
482 | ieee80211_tx_skb(sdata, skb, 0); | |
483 | } | |
484 | ||
485 | /* powersave */ | |
486 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
487 | struct ieee80211_sub_if_data *sdata) | |
488 | { | |
489 | struct ieee80211_conf *conf = &local->hw.conf; | |
490 | ||
d5edaedc JB |
491 | /* |
492 | * If we are scanning right now then the parameters will | |
493 | * take effect when scan finishes. | |
494 | */ | |
495 | if (local->hw_scanning || local->sw_scanning) | |
496 | return; | |
497 | ||
965bedad JB |
498 | if (conf->dynamic_ps_timeout > 0 && |
499 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
500 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
501 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
502 | } else { | |
503 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
504 | ieee80211_send_nullfunc(local, sdata, 1); | |
505 | conf->flags |= IEEE80211_CONF_PS; | |
506 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
507 | } | |
508 | } | |
509 | ||
510 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
511 | { | |
512 | struct ieee80211_conf *conf = &local->hw.conf; | |
513 | ||
514 | if (local->ps_sdata) { | |
515 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
516 | return; | |
517 | ||
518 | ieee80211_enable_ps(local, local->ps_sdata); | |
519 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
520 | conf->flags &= ~IEEE80211_CONF_PS; | |
521 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
522 | del_timer_sync(&local->dynamic_ps_timer); | |
523 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
524 | } | |
525 | } | |
526 | ||
527 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 528 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
529 | { |
530 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
531 | int count = 0; | |
532 | ||
533 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
534 | local->ps_sdata = NULL; | |
535 | return; | |
536 | } | |
537 | ||
538 | list_for_each_entry(sdata, &local->interfaces, list) { | |
539 | if (!netif_running(sdata->dev)) | |
540 | continue; | |
541 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
542 | continue; | |
543 | found = sdata; | |
544 | count++; | |
545 | } | |
546 | ||
10f644a4 JB |
547 | if (count == 1 && found->u.mgd.powersave) { |
548 | s32 beaconint_us; | |
549 | ||
550 | if (latency < 0) | |
551 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
552 | ||
553 | beaconint_us = ieee80211_tu_to_usec( | |
554 | found->vif.bss_conf.beacon_int); | |
555 | ||
04fe2037 | 556 | if (beaconint_us > latency) { |
10f644a4 | 557 | local->ps_sdata = NULL; |
04fe2037 JB |
558 | } else { |
559 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
560 | int maxslp = 1; | |
561 | ||
562 | if (dtimper > 1) | |
563 | maxslp = min_t(int, dtimper, | |
564 | latency / beaconint_us); | |
565 | ||
9ccebe61 | 566 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 567 | local->ps_sdata = found; |
04fe2037 | 568 | } |
10f644a4 | 569 | } else { |
965bedad | 570 | local->ps_sdata = NULL; |
10f644a4 | 571 | } |
965bedad JB |
572 | |
573 | ieee80211_change_ps(local); | |
574 | } | |
575 | ||
576 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
577 | { | |
578 | struct ieee80211_local *local = | |
579 | container_of(work, struct ieee80211_local, | |
580 | dynamic_ps_disable_work); | |
581 | ||
582 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
583 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
584 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
585 | } | |
586 | ||
587 | ieee80211_wake_queues_by_reason(&local->hw, | |
588 | IEEE80211_QUEUE_STOP_REASON_PS); | |
589 | } | |
590 | ||
591 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
592 | { | |
593 | struct ieee80211_local *local = | |
594 | container_of(work, struct ieee80211_local, | |
595 | dynamic_ps_enable_work); | |
596 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
597 | ||
598 | /* can only happen when PS was just disabled anyway */ | |
599 | if (!sdata) | |
600 | return; | |
601 | ||
602 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
603 | return; | |
604 | ||
605 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
606 | ieee80211_send_nullfunc(local, sdata, 1); | |
607 | ||
608 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
609 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
610 | } | |
611 | ||
612 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
613 | { | |
614 | struct ieee80211_local *local = (void *) data; | |
615 | ||
616 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
617 | } | |
618 | ||
60f8b39c | 619 | /* MLME */ |
f698d856 | 620 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 621 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
622 | u8 *wmm_param, size_t wmm_param_len) |
623 | { | |
f0706e82 JB |
624 | struct ieee80211_tx_queue_params params; |
625 | size_t left; | |
626 | int count; | |
627 | u8 *pos; | |
628 | ||
46900298 | 629 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
630 | return; |
631 | ||
632 | if (!wmm_param) | |
633 | return; | |
634 | ||
f0706e82 JB |
635 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
636 | return; | |
637 | count = wmm_param[6] & 0x0f; | |
46900298 | 638 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 639 | return; |
46900298 | 640 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
641 | |
642 | pos = wmm_param + 8; | |
643 | left = wmm_param_len - 8; | |
644 | ||
645 | memset(¶ms, 0, sizeof(params)); | |
646 | ||
f0706e82 JB |
647 | local->wmm_acm = 0; |
648 | for (; left >= 4; left -= 4, pos += 4) { | |
649 | int aci = (pos[0] >> 5) & 0x03; | |
650 | int acm = (pos[0] >> 4) & 0x01; | |
651 | int queue; | |
652 | ||
653 | switch (aci) { | |
0eeb59fe | 654 | case 1: /* AC_BK */ |
e100bb64 | 655 | queue = 3; |
988c0f72 | 656 | if (acm) |
0eeb59fe | 657 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 658 | break; |
0eeb59fe | 659 | case 2: /* AC_VI */ |
e100bb64 | 660 | queue = 1; |
988c0f72 | 661 | if (acm) |
0eeb59fe | 662 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 663 | break; |
0eeb59fe | 664 | case 3: /* AC_VO */ |
e100bb64 | 665 | queue = 0; |
988c0f72 | 666 | if (acm) |
0eeb59fe | 667 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 668 | break; |
0eeb59fe | 669 | case 0: /* AC_BE */ |
f0706e82 | 670 | default: |
e100bb64 | 671 | queue = 2; |
988c0f72 | 672 | if (acm) |
0eeb59fe | 673 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
674 | break; |
675 | } | |
676 | ||
677 | params.aifs = pos[0] & 0x0f; | |
678 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
679 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 680 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 681 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 682 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 683 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 684 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
685 | params.cw_max, params.txop); |
686 | #endif | |
24487981 | 687 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 688 | printk(KERN_DEBUG "%s: failed to set TX queue " |
24487981 JB |
689 | "parameters for queue %d\n", local->mdev->name, |
690 | queue); | |
f0706e82 JB |
691 | } |
692 | } | |
693 | ||
7a5158ef JB |
694 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
695 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 696 | { |
bda3933a | 697 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 698 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 699 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 700 | #endif |
471b3efd | 701 | u32 changed = 0; |
7a5158ef JB |
702 | bool use_protection; |
703 | bool use_short_preamble; | |
704 | bool use_short_slot; | |
705 | ||
706 | if (erp_valid) { | |
707 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
708 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
709 | } else { | |
710 | use_protection = false; | |
711 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
712 | } | |
713 | ||
714 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 715 | |
471b3efd | 716 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 717 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 718 | if (net_ratelimit()) { |
0c68ae26 | 719 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 720 | sdata->dev->name, |
5628221c | 721 | use_protection ? "enabled" : "disabled", |
46900298 | 722 | ifmgd->bssid); |
5628221c | 723 | } |
f4ea83dd | 724 | #endif |
471b3efd JB |
725 | bss_conf->use_cts_prot = use_protection; |
726 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 727 | } |
7e9ed188 | 728 | |
d43c7b37 | 729 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 730 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
731 | if (net_ratelimit()) { |
732 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 733 | " (BSSID=%pM)\n", |
471b3efd | 734 | sdata->dev->name, |
d43c7b37 | 735 | use_short_preamble ? "short" : "long", |
46900298 | 736 | ifmgd->bssid); |
7e9ed188 | 737 | } |
f4ea83dd | 738 | #endif |
d43c7b37 | 739 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 740 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 741 | } |
d9430a32 | 742 | |
7a5158ef JB |
743 | if (use_short_slot != bss_conf->use_short_slot) { |
744 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
745 | if (net_ratelimit()) { | |
391429c1 CL |
746 | printk(KERN_DEBUG "%s: switched to %s slot time" |
747 | " (BSSID=%pM)\n", | |
7a5158ef JB |
748 | sdata->dev->name, |
749 | use_short_slot ? "short" : "long", | |
46900298 | 750 | ifmgd->bssid); |
7a5158ef JB |
751 | } |
752 | #endif | |
753 | bss_conf->use_short_slot = use_short_slot; | |
754 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
755 | } |
756 | ||
757 | return changed; | |
758 | } | |
759 | ||
46900298 | 760 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
761 | { |
762 | union iwreq_data wrqu; | |
46900298 | 763 | |
f5e5bf25 | 764 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
765 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
766 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
767 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
768 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
769 | } | |
770 | ||
46900298 | 771 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 772 | { |
46900298 | 773 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
774 | char *buf; |
775 | size_t len; | |
776 | int i; | |
f0706e82 JB |
777 | union iwreq_data wrqu; |
778 | ||
46900298 | 779 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
780 | return; |
781 | ||
46900298 JB |
782 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
783 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
784 | if (!buf) |
785 | return; | |
786 | ||
787 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 788 | if (ifmgd->assocreq_ies) { |
74af0250 | 789 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 790 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 791 | len += sprintf(buf + len, "%02x", |
46900298 | 792 | ifmgd->assocreq_ies[i]); |
74af0250 | 793 | } |
f0706e82 | 794 | } |
46900298 JB |
795 | if (ifmgd->assocresp_ies) { |
796 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
797 | len += sprintf(buf + len, " "); |
798 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 799 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 800 | len += sprintf(buf + len, "%02x", |
46900298 | 801 | ifmgd->assocresp_ies[i]); |
74af0250 | 802 | } |
f0706e82 | 803 | } |
74af0250 LT |
804 | len += sprintf(buf + len, ")"); |
805 | ||
806 | if (len > IW_CUSTOM_MAX) { | |
807 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 808 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 809 | len += sprintf(buf + len, "%02x", |
46900298 | 810 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
811 | } |
812 | } | |
813 | ||
ad788b5e JL |
814 | if (len <= IW_CUSTOM_MAX) { |
815 | memset(&wrqu, 0, sizeof(wrqu)); | |
816 | wrqu.data.length = len; | |
817 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
818 | } | |
74af0250 LT |
819 | |
820 | kfree(buf); | |
f0706e82 JB |
821 | } |
822 | ||
823 | ||
f698d856 | 824 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 825 | u32 bss_info_changed) |
f0706e82 | 826 | { |
46900298 | 827 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 828 | struct ieee80211_local *local = sdata->local; |
38668c05 | 829 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 830 | |
c2b13452 | 831 | struct ieee80211_bss *bss; |
d6f2da5b | 832 | |
ae5eb026 | 833 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 834 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 835 | |
46900298 | 836 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 837 | conf->channel->center_freq, |
46900298 | 838 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
839 | if (bss) { |
840 | /* set timing information */ | |
00d3f14c JB |
841 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
842 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 843 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 844 | |
57c4d7b4 | 845 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 846 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 847 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 848 | |
04de8381 KV |
849 | cfg80211_hold_bss(&bss->cbss); |
850 | ||
9ac19a90 | 851 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
852 | } |
853 | ||
46900298 JB |
854 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
855 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
856 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 857 | |
46900298 | 858 | ifmgd->last_probe = jiffies; |
9ac19a90 | 859 | ieee80211_led_assoc(local, 1); |
9306102e | 860 | |
bda3933a | 861 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
862 | /* |
863 | * For now just always ask the driver to update the basic rateset | |
864 | * when we have associated, we aren't checking whether it actually | |
865 | * changed or not. | |
866 | */ | |
ae5eb026 JB |
867 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
868 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 869 | |
965bedad | 870 | /* will be same as sdata */ |
04fe2037 JB |
871 | if (local->ps_sdata) { |
872 | mutex_lock(&local->iflist_mtx); | |
873 | ieee80211_recalc_ps(local, -1); | |
874 | mutex_unlock(&local->iflist_mtx); | |
875 | } | |
e0cb686f | 876 | |
9ac19a90 JB |
877 | netif_tx_start_all_queues(sdata->dev); |
878 | netif_carrier_on(sdata->dev); | |
f0706e82 | 879 | |
46900298 | 880 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
881 | } |
882 | ||
46900298 | 883 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 884 | { |
46900298 | 885 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 886 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
887 | |
888 | ifmgd->direct_probe_tries++; | |
889 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 890 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
891 | sdata->dev->name, ifmgd->bssid); |
892 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e61f2340 | 893 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
7a947080 VT |
894 | |
895 | /* | |
896 | * Most likely AP is not in the range so remove the | |
897 | * bss information associated to the AP | |
898 | */ | |
46900298 | 899 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 900 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 901 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
902 | |
903 | /* | |
904 | * We might have a pending scan which had no chance to run yet | |
905 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
906 | * Hence, queue the STAs work again | |
907 | */ | |
908 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
909 | return; |
910 | } | |
f0706e82 | 911 | |
0c68ae26 | 912 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
913 | sdata->dev->name, ifmgd->bssid, |
914 | ifmgd->direct_probe_tries); | |
f0706e82 | 915 | |
46900298 | 916 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 917 | |
9ac19a90 JB |
918 | /* Direct probe is sent to broadcast address as some APs |
919 | * will not answer to direct packet in unassociated state. | |
920 | */ | |
921 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 922 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 923 | |
46900298 | 924 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 925 | } |
f0706e82 | 926 | |
9ac19a90 | 927 | |
46900298 | 928 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 929 | { |
46900298 | 930 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 931 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
932 | u8 *ies; |
933 | size_t ies_len; | |
46900298 JB |
934 | |
935 | ifmgd->auth_tries++; | |
936 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 937 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 938 | " timed out\n", |
46900298 JB |
939 | sdata->dev->name, ifmgd->bssid); |
940 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1965c853 | 941 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 942 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 943 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 944 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
945 | |
946 | /* | |
947 | * We might have a pending scan which had no chance to run yet | |
948 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
949 | * Hence, queue the STAs work again | |
950 | */ | |
951 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
952 | return; |
953 | } | |
f0706e82 | 954 | |
46900298 | 955 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 956 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 957 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 958 | |
636a5d36 JM |
959 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
960 | ies = ifmgd->sme_auth_ie; | |
961 | ies_len = ifmgd->sme_auth_ie_len; | |
962 | } else { | |
963 | ies = NULL; | |
964 | ies_len = 0; | |
965 | } | |
966 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
967 | ifmgd->bssid, 0); |
968 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 969 | |
46900298 | 970 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
971 | } |
972 | ||
5925d976 VN |
973 | /* |
974 | * The disassoc 'reason' argument can be either our own reason | |
975 | * if self disconnected or a reason code from the AP. | |
976 | */ | |
aa458d17 | 977 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
978 | bool deauth, bool self_disconnected, |
979 | u16 reason) | |
aa458d17 | 980 | { |
46900298 | 981 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 982 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
983 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
984 | struct ieee80211_bss *bss; | |
aa458d17 | 985 | struct sta_info *sta; |
e0cb686f | 986 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
987 | |
988 | rcu_read_lock(); | |
989 | ||
46900298 | 990 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
991 | if (!sta) { |
992 | rcu_read_unlock(); | |
993 | return; | |
994 | } | |
995 | ||
996 | if (deauth) { | |
46900298 JB |
997 | ifmgd->direct_probe_tries = 0; |
998 | ifmgd->auth_tries = 0; | |
aa458d17 | 999 | } |
46900298 JB |
1000 | ifmgd->assoc_scan_tries = 0; |
1001 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1002 | |
24e64622 | 1003 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1004 | netif_carrier_off(sdata->dev); |
1005 | ||
2dace10e | 1006 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1007 | |
04de8381 KV |
1008 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1009 | conf->channel->center_freq, | |
1010 | ifmgd->ssid, ifmgd->ssid_len); | |
1011 | ||
1012 | if (bss) { | |
1013 | cfg80211_unhold_bss(&bss->cbss); | |
1014 | ieee80211_rx_bss_put(local, bss); | |
1015 | } | |
1016 | ||
aa458d17 TW |
1017 | if (self_disconnected) { |
1018 | if (deauth) | |
ef422bc0 JB |
1019 | ieee80211_send_deauth_disassoc(sdata, |
1020 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1021 | else |
ef422bc0 JB |
1022 | ieee80211_send_deauth_disassoc(sdata, |
1023 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1024 | } |
1025 | ||
46900298 | 1026 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1027 | changed |= ieee80211_reset_erp_info(sdata); |
1028 | ||
f5e5bf25 | 1029 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1030 | changed |= BSS_CHANGED_ASSOC; |
1031 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1032 | |
46900298 | 1033 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1034 | |
7a947080 | 1035 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1036 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1037 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1038 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1039 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1040 | } |
aa458d17 | 1041 | |
aa458d17 TW |
1042 | rcu_read_unlock(); |
1043 | ||
4797938c | 1044 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1045 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1046 | |
a8302de9 VT |
1047 | local->power_constr_level = 0; |
1048 | ||
520eb820 KV |
1049 | del_timer_sync(&local->dynamic_ps_timer); |
1050 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1051 | ||
e0cb686f KV |
1052 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1053 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1054 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1055 | } | |
ae5eb026 | 1056 | |
e0cb686f | 1057 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1058 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1059 | |
1060 | rcu_read_lock(); | |
1061 | ||
46900298 | 1062 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1063 | if (!sta) { |
1064 | rcu_read_unlock(); | |
1065 | return; | |
1066 | } | |
1067 | ||
1068 | sta_info_unlink(&sta); | |
1069 | ||
1070 | rcu_read_unlock(); | |
1071 | ||
1072 | sta_info_destroy(sta); | |
aa458d17 | 1073 | } |
f0706e82 | 1074 | |
9ac19a90 JB |
1075 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1076 | { | |
1077 | if (!sdata || !sdata->default_key || | |
1078 | sdata->default_key->conf.alg != ALG_WEP) | |
1079 | return 0; | |
1080 | return 1; | |
1081 | } | |
1082 | ||
46900298 | 1083 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1084 | { |
46900298 | 1085 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1086 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1087 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1088 | int bss_privacy; |
1089 | int wep_privacy; | |
1090 | int privacy_invoked; | |
f0706e82 | 1091 | |
7986cf95 | 1092 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1093 | return 0; |
1094 | ||
46900298 | 1095 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1096 | local->hw.conf.channel->center_freq, |
46900298 | 1097 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1098 | if (!bss) |
1099 | return 0; | |
1100 | ||
00d3f14c | 1101 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1102 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1103 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1104 | |
3e122be0 | 1105 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1106 | |
5b98b1f7 JB |
1107 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1108 | return 0; | |
1109 | ||
1110 | return 1; | |
f0706e82 JB |
1111 | } |
1112 | ||
46900298 | 1113 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1114 | { |
46900298 | 1115 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1116 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1117 | |
1118 | ifmgd->assoc_tries++; | |
1119 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1120 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1121 | " timed out\n", |
46900298 JB |
1122 | sdata->dev->name, ifmgd->bssid); |
1123 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1965c853 | 1124 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1125 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1126 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1127 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1128 | /* |
1129 | * We might have a pending scan which had no chance to run yet | |
1130 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1131 | * Hence, queue the STAs work again | |
1132 | */ | |
1133 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1134 | return; |
1135 | } | |
1136 | ||
46900298 | 1137 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1138 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1139 | sdata->dev->name, ifmgd->bssid); |
1140 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1141 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1142 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1143 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1144 | return; |
1145 | } | |
1146 | ||
46900298 | 1147 | ieee80211_send_assoc(sdata); |
f0706e82 | 1148 | |
46900298 | 1149 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1150 | } |
1151 | ||
3cf335d5 KV |
1152 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1153 | struct ieee80211_hdr *hdr) | |
1154 | { | |
1155 | /* | |
1156 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1157 | * from AP because we know that the connection is working both ways | |
1158 | * at that time. But multicast frames (and hence also beacons) must | |
1159 | * be ignored here, because we need to trigger the timer during | |
1160 | * data idle periods for sending the periodical probe request to | |
1161 | * the AP. | |
1162 | */ | |
1163 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1164 | mod_timer(&sdata->u.mgd.timer, | |
1165 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1166 | } | |
f0706e82 | 1167 | |
04de8381 KV |
1168 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1169 | { | |
1170 | struct ieee80211_sub_if_data *sdata = | |
1171 | container_of(work, struct ieee80211_sub_if_data, | |
1172 | u.mgd.beacon_loss_work); | |
1173 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1174 | ||
a860402d MB |
1175 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1176 | if (net_ratelimit()) { | |
1177 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1178 | "- sending probe request\n", sdata->dev->name, | |
1179 | sdata->u.mgd.bssid); | |
1180 | } | |
1181 | #endif | |
04de8381 KV |
1182 | |
1183 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1184 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1185 | ifmgd->ssid_len, NULL, 0); | |
1186 | ||
1187 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL); | |
1188 | } | |
1189 | ||
1190 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1191 | { | |
1192 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1193 | ||
1194 | queue_work(sdata->local->hw.workqueue, | |
1195 | &sdata->u.mgd.beacon_loss_work); | |
1196 | } | |
1197 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1198 | ||
46900298 | 1199 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1200 | { |
46900298 | 1201 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1202 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1203 | struct sta_info *sta; |
15b7b062 | 1204 | bool disassoc = false; |
f0706e82 JB |
1205 | |
1206 | /* TODO: start monitoring current AP signal quality and number of | |
1207 | * missed beacons. Scan other channels every now and then and search | |
1208 | * for better APs. */ | |
1209 | /* TODO: remove expired BSSes */ | |
1210 | ||
46900298 | 1211 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1212 | |
d0709a65 JB |
1213 | rcu_read_lock(); |
1214 | ||
46900298 | 1215 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1216 | if (!sta) { |
0c68ae26 | 1217 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1218 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1219 | disassoc = true; |
1220 | goto unlock; | |
1221 | } | |
1222 | ||
1223 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
1224 | time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
1225 | printk(KERN_DEBUG "%s: no probe response from AP %pM " | |
1226 | "- disassociating\n", | |
1227 | sdata->dev->name, ifmgd->bssid); | |
1228 | disassoc = true; | |
1229 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1230 | goto unlock; | |
1231 | } | |
1232 | ||
04de8381 KV |
1233 | /* |
1234 | * Beacon filtering is only enabled with power save and then the | |
1235 | * stack should not check for beacon loss. | |
1236 | */ | |
1237 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1238 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1239 | time_after(jiffies, | |
15b7b062 | 1240 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1241 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1242 | if (net_ratelimit()) { | |
1243 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1244 | "- sending probe request\n", | |
1245 | sdata->dev->name, ifmgd->bssid); | |
1246 | } | |
1247 | #endif | |
15b7b062 KV |
1248 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1249 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1250 | ifmgd->ssid_len, NULL, 0); | |
1251 | goto unlock; | |
1252 | ||
1253 | } | |
1254 | ||
1255 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1256 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1257 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1258 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1259 | } |
d0709a65 | 1260 | |
15b7b062 | 1261 | unlock: |
d0709a65 JB |
1262 | rcu_read_unlock(); |
1263 | ||
7a947080 | 1264 | if (disassoc) |
46900298 | 1265 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1266 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1267 | else |
46900298 | 1268 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1269 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1270 | } |
1271 | ||
1272 | ||
46900298 | 1273 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1274 | { |
46900298 JB |
1275 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1276 | ||
f698d856 | 1277 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1278 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1279 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1280 | /* Wait for SME to request association */ | |
1281 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1282 | } else | |
1283 | ieee80211_associate(sdata); | |
f0706e82 JB |
1284 | } |
1285 | ||
1286 | ||
f698d856 | 1287 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1288 | struct ieee80211_mgmt *mgmt, |
1289 | size_t len) | |
1290 | { | |
1291 | u8 *pos; | |
1292 | struct ieee802_11_elems elems; | |
1293 | ||
f0706e82 | 1294 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1295 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1296 | if (!elems.challenge) |
f0706e82 | 1297 | return; |
46900298 JB |
1298 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1299 | elems.challenge - 2, elems.challenge_len + 2, | |
1300 | sdata->u.mgd.bssid, 1); | |
1301 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1302 | } |
1303 | ||
f698d856 | 1304 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1305 | struct ieee80211_mgmt *mgmt, |
1306 | size_t len) | |
1307 | { | |
46900298 | 1308 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1309 | u16 auth_alg, auth_transaction, status_code; |
1310 | ||
46900298 | 1311 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1312 | return; |
f0706e82 | 1313 | |
f4ea83dd | 1314 | if (len < 24 + 6) |
f0706e82 | 1315 | return; |
f0706e82 | 1316 | |
46900298 | 1317 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1318 | return; |
f0706e82 | 1319 | |
46900298 | 1320 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1321 | return; |
f0706e82 JB |
1322 | |
1323 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1324 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1325 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1326 | ||
46900298 JB |
1327 | if (auth_alg != ifmgd->auth_alg || |
1328 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1329 | return; |
f0706e82 JB |
1330 | |
1331 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1332 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1333 | u8 algs[3]; | |
1334 | const int num_algs = ARRAY_SIZE(algs); | |
1335 | int i, pos; | |
1336 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1337 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1338 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1339 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1340 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1341 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1342 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1343 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1344 | pos = 0; |
46900298 | 1345 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1346 | pos = 1; |
1347 | else | |
1348 | pos = 2; | |
1349 | for (i = 0; i < num_algs; i++) { | |
1350 | pos++; | |
1351 | if (pos >= num_algs) | |
1352 | pos = 0; | |
46900298 | 1353 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1354 | algs[pos] == 0xff) |
1355 | continue; | |
1356 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1357 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1358 | continue; |
46900298 | 1359 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1360 | break; |
1361 | } | |
1362 | } | |
1363 | return; | |
1364 | } | |
1365 | ||
46900298 | 1366 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1367 | case WLAN_AUTH_OPEN: |
1368 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1369 | case WLAN_AUTH_FT: |
46900298 | 1370 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1371 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1372 | break; |
1373 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1374 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1375 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1376 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1377 | } else | |
46900298 | 1378 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1379 | break; |
1380 | } | |
1381 | } | |
1382 | ||
1383 | ||
f698d856 | 1384 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1385 | struct ieee80211_mgmt *mgmt, |
1386 | size_t len) | |
1387 | { | |
46900298 | 1388 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1389 | u16 reason_code; |
1390 | ||
f4ea83dd | 1391 | if (len < 24 + 2) |
f0706e82 | 1392 | return; |
f0706e82 | 1393 | |
46900298 | 1394 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1395 | return; |
f0706e82 JB |
1396 | |
1397 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1398 | ||
46900298 | 1399 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1400 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1401 | sdata->dev->name, reason_code); | |
f0706e82 | 1402 | |
636a5d36 JM |
1403 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1404 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1405 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1406 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1407 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1408 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1409 | IEEE80211_RETRY_AUTH_INTERVAL); |
1410 | } | |
1411 | ||
46900298 JB |
1412 | ieee80211_set_disassoc(sdata, true, false, 0); |
1413 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1414 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1415 | } |
1416 | ||
1417 | ||
f698d856 | 1418 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1419 | struct ieee80211_mgmt *mgmt, |
1420 | size_t len) | |
1421 | { | |
46900298 | 1422 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1423 | u16 reason_code; |
1424 | ||
f4ea83dd | 1425 | if (len < 24 + 2) |
f0706e82 | 1426 | return; |
f0706e82 | 1427 | |
46900298 | 1428 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1429 | return; |
f0706e82 JB |
1430 | |
1431 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1432 | ||
46900298 | 1433 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1434 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1435 | sdata->dev->name, reason_code); | |
f0706e82 | 1436 | |
636a5d36 JM |
1437 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1438 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1439 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1440 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1441 | IEEE80211_RETRY_AUTH_INTERVAL); |
1442 | } | |
1443 | ||
46900298 | 1444 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1445 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1446 | } |
1447 | ||
1448 | ||
471b3efd | 1449 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1450 | struct ieee80211_mgmt *mgmt, |
1451 | size_t len, | |
1452 | int reassoc) | |
1453 | { | |
46900298 | 1454 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1455 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1456 | struct ieee80211_supported_band *sband; |
f0706e82 | 1457 | struct sta_info *sta; |
881d948c | 1458 | u32 rates, basic_rates; |
f0706e82 JB |
1459 | u16 capab_info, status_code, aid; |
1460 | struct ieee802_11_elems elems; | |
bda3933a | 1461 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1462 | u8 *pos; |
ae5eb026 | 1463 | u32 changed = 0; |
f0706e82 | 1464 | int i, j; |
ddf4ac53 | 1465 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1466 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1467 | |
1468 | /* AssocResp and ReassocResp have identical structure, so process both | |
1469 | * of them in this function. */ | |
1470 | ||
46900298 | 1471 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1472 | return; |
f0706e82 | 1473 | |
f4ea83dd | 1474 | if (len < 24 + 6) |
f0706e82 | 1475 | return; |
f0706e82 | 1476 | |
46900298 | 1477 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1478 | return; |
f0706e82 JB |
1479 | |
1480 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1481 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1482 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1483 | |
0c68ae26 | 1484 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1485 | "status=%d aid=%d)\n", |
0c68ae26 | 1486 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1487 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1488 | |
63a5ab82 JM |
1489 | pos = mgmt->u.assoc_resp.variable; |
1490 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1491 | ||
1492 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1493 | elems.timeout_int && elems.timeout_int_len == 5 && |
1494 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1495 | u32 tu, ms; |
f797eb7e | 1496 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1497 | ms = tu * 1024 / 1000; |
1498 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1499 | "comeback duration %u TU (%u ms)\n", | |
1500 | sdata->dev->name, tu, ms); | |
1501 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1502 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1503 | jiffies + msecs_to_jiffies(ms)); |
1504 | return; | |
1505 | } | |
1506 | ||
f0706e82 JB |
1507 | if (status_code != WLAN_STATUS_SUCCESS) { |
1508 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1509 | sdata->dev->name, status_code); |
8a69aa93 DD |
1510 | /* if this was a reassociation, ensure we try a "full" |
1511 | * association next time. This works around some broken APs | |
1512 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1513 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1514 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1515 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1516 | /* Wait for SME to decide what to do next */ | |
1517 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1518 | } | |
f0706e82 JB |
1519 | return; |
1520 | } | |
1521 | ||
1dd84aa2 JB |
1522 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1523 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1524 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1525 | aid &= ~(BIT(15) | BIT(14)); |
1526 | ||
f0706e82 JB |
1527 | if (!elems.supp_rates) { |
1528 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1529 | sdata->dev->name); |
f0706e82 JB |
1530 | return; |
1531 | } | |
1532 | ||
f698d856 | 1533 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1534 | ifmgd->aid = aid; |
1535 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1536 | |
46900298 JB |
1537 | kfree(ifmgd->assocresp_ies); |
1538 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1539 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1540 | if (ifmgd->assocresp_ies) | |
1541 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1542 | |
d0709a65 JB |
1543 | rcu_read_lock(); |
1544 | ||
f0706e82 | 1545 | /* Add STA entry for the AP */ |
46900298 | 1546 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1547 | if (!sta) { |
ddf4ac53 | 1548 | newsta = true; |
d0709a65 | 1549 | |
46900298 | 1550 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1551 | if (!sta) { |
1552 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1553 | " the AP\n", sdata->dev->name); |
d0709a65 | 1554 | rcu_read_unlock(); |
f0706e82 JB |
1555 | return; |
1556 | } | |
f709fc69 | 1557 | |
60f8b39c JB |
1558 | /* update new sta with its last rx activity */ |
1559 | sta->last_rx = jiffies; | |
f709fc69 | 1560 | } |
f709fc69 | 1561 | |
60f8b39c JB |
1562 | /* |
1563 | * FIXME: Do we really need to update the sta_info's information here? | |
1564 | * We already know about the AP (we found it in our list) so it | |
1565 | * should already be filled with the right info, no? | |
1566 | * As is stands, all this is racy because typically we assume | |
1567 | * the information that is filled in here (except flags) doesn't | |
1568 | * change while a STA structure is alive. As such, it should move | |
1569 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1570 | */ | |
f709fc69 | 1571 | |
60f8b39c JB |
1572 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1573 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1574 | |
60f8b39c JB |
1575 | rates = 0; |
1576 | basic_rates = 0; | |
1577 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1578 | |
60f8b39c JB |
1579 | for (i = 0; i < elems.supp_rates_len; i++) { |
1580 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1581 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1582 | |
60f8b39c JB |
1583 | if (rate > 110) |
1584 | have_higher_than_11mbit = true; | |
1585 | ||
1586 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1587 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1588 | rates |= BIT(j); |
d61272cb TW |
1589 | if (is_basic) |
1590 | basic_rates |= BIT(j); | |
1591 | break; | |
1592 | } | |
f709fc69 | 1593 | } |
f709fc69 LCC |
1594 | } |
1595 | ||
60f8b39c JB |
1596 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1597 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1598 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1599 | |
60f8b39c JB |
1600 | if (rate > 110) |
1601 | have_higher_than_11mbit = true; | |
f0706e82 | 1602 | |
60f8b39c | 1603 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1604 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1605 | rates |= BIT(j); |
d61272cb TW |
1606 | if (is_basic) |
1607 | basic_rates |= BIT(j); | |
1608 | break; | |
1609 | } | |
60f8b39c | 1610 | } |
1ebebea8 | 1611 | } |
f0706e82 | 1612 | |
323ce79a | 1613 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1614 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1615 | |
1616 | /* cf. IEEE 802.11 9.2.12 */ | |
1617 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1618 | have_higher_than_11mbit) | |
1619 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1620 | else | |
1621 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1622 | |
e65c2263 S |
1623 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1624 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1625 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1626 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1627 | |
1628 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1629 | |
4b7679a5 | 1630 | rate_control_rate_init(sta); |
f0706e82 | 1631 | |
46900298 | 1632 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1633 | set_sta_flags(sta, WLAN_STA_MFP); |
1634 | ||
ddf4ac53 | 1635 | if (elems.wmm_param) |
60f8b39c | 1636 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1637 | |
1638 | if (newsta) { | |
1639 | int err = sta_info_insert(sta); | |
1640 | if (err) { | |
1641 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1642 | " the AP (error %d)\n", sdata->dev->name, err); | |
1643 | rcu_read_unlock(); | |
1644 | return; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | rcu_read_unlock(); | |
1649 | ||
1650 | if (elems.wmm_param) | |
46900298 | 1651 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1652 | elems.wmm_param_len); |
f0706e82 | 1653 | |
ae5eb026 | 1654 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1655 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1656 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1657 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1658 | ap_ht_cap_flags); | |
1659 | ||
60f8b39c JB |
1660 | /* set AID and assoc capability, |
1661 | * ieee80211_set_associated() will tell the driver */ | |
1662 | bss_conf->aid = aid; | |
1663 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1664 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1665 | |
15b7b062 KV |
1666 | /* |
1667 | * initialise the time of last beacon to be the association time, | |
1668 | * otherwise beacon loss check will trigger immediately | |
1669 | */ | |
1670 | ifmgd->last_beacon = jiffies; | |
1671 | ||
46900298 | 1672 | ieee80211_associated(sdata); |
6039f6d2 | 1673 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1674 | } |
1675 | ||
1676 | ||
98c8fccf JB |
1677 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1678 | struct ieee80211_mgmt *mgmt, | |
1679 | size_t len, | |
1680 | struct ieee80211_rx_status *rx_status, | |
1681 | struct ieee802_11_elems *elems, | |
1682 | bool beacon) | |
1683 | { | |
1684 | struct ieee80211_local *local = sdata->local; | |
1685 | int freq; | |
c2b13452 | 1686 | struct ieee80211_bss *bss; |
98c8fccf | 1687 | struct ieee80211_channel *channel; |
98c8fccf JB |
1688 | |
1689 | if (elems->ds_params && elems->ds_params_len == 1) | |
1690 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1691 | else | |
1692 | freq = rx_status->freq; | |
1693 | ||
1694 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1695 | ||
1696 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1697 | return; | |
1698 | ||
98c8fccf | 1699 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1700 | channel, beacon); |
98c8fccf JB |
1701 | if (!bss) |
1702 | return; | |
1703 | ||
c481ec97 | 1704 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1705 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1706 | struct ieee80211_channel_sw_ie *sw_elem = |
1707 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1708 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1709 | } | |
1710 | ||
3e122be0 | 1711 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1712 | } |
1713 | ||
1714 | ||
f698d856 | 1715 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1716 | struct ieee80211_mgmt *mgmt, |
1717 | size_t len, | |
1718 | struct ieee80211_rx_status *rx_status) | |
1719 | { | |
15b7b062 | 1720 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1721 | size_t baselen; |
1722 | struct ieee802_11_elems elems; | |
1723 | ||
15b7b062 KV |
1724 | ifmgd = &sdata->u.mgd; |
1725 | ||
8e7cdbb6 TW |
1726 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1727 | return; /* ignore ProbeResp to foreign address */ | |
1728 | ||
ae6a44e3 EK |
1729 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1730 | if (baselen > len) | |
1731 | return; | |
1732 | ||
1733 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1734 | &elems); | |
1735 | ||
98c8fccf | 1736 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1737 | |
1738 | /* direct probe may be part of the association flow */ | |
16cf438a | 1739 | if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
9859b81e RR |
1740 | printk(KERN_DEBUG "%s direct probe responded\n", |
1741 | sdata->dev->name); | |
46900298 | 1742 | ieee80211_authenticate(sdata); |
9859b81e | 1743 | } |
15b7b062 KV |
1744 | |
1745 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1746 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1747 | } |
1748 | ||
d91f36db JB |
1749 | /* |
1750 | * This is the canonical list of information elements we care about, | |
1751 | * the filter code also gives us all changes to the Microsoft OUI | |
1752 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1753 | * | |
1754 | * We implement beacon filtering in software since that means we can | |
1755 | * avoid processing the frame here and in cfg80211, and userspace | |
1756 | * will not be able to tell whether the hardware supports it or not. | |
1757 | * | |
1758 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1759 | * add items it requires. It also needs to be able to tell us to | |
1760 | * look out for other vendor IEs. | |
1761 | */ | |
1762 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1763 | (1ULL << WLAN_EID_COUNTRY) | |
1764 | (1ULL << WLAN_EID_ERP_INFO) | | |
1765 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1766 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1767 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1768 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1769 | |
f698d856 | 1770 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1771 | struct ieee80211_mgmt *mgmt, |
1772 | size_t len, | |
1773 | struct ieee80211_rx_status *rx_status) | |
1774 | { | |
d91f36db | 1775 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1776 | size_t baselen; |
1777 | struct ieee802_11_elems elems; | |
f698d856 | 1778 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1779 | u32 changed = 0; |
d91f36db | 1780 | bool erp_valid, directed_tim = false; |
7a5158ef | 1781 | u8 erp_value = 0; |
d91f36db | 1782 | u32 ncrc; |
f0706e82 | 1783 | |
ae6a44e3 EK |
1784 | /* Process beacon from the current BSS */ |
1785 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1786 | if (baselen > len) | |
1787 | return; | |
1788 | ||
d91f36db | 1789 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1790 | return; |
f0706e82 | 1791 | |
46900298 JB |
1792 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1793 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1794 | return; |
1795 | ||
d91f36db JB |
1796 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1797 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1798 | len - baselen, &elems, | |
1799 | care_about_ies, ncrc); | |
1800 | ||
1801 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1802 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1803 | ifmgd->aid); | |
d91f36db JB |
1804 | |
1805 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1806 | ||
1807 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1808 | return; |
d91f36db JB |
1809 | ifmgd->beacon_crc = ncrc; |
1810 | ||
1811 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1812 | |
46900298 | 1813 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1814 | elems.wmm_param_len); |
1815 | ||
25c9c875 | 1816 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1817 | if (directed_tim) { |
572e0012 KV |
1818 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1819 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1820 | ieee80211_hw_config(local, | |
1821 | IEEE80211_CONF_CHANGE_PS); | |
1822 | ieee80211_send_nullfunc(local, sdata, 0); | |
1823 | } else { | |
1824 | local->pspolling = true; | |
1825 | ||
1826 | /* | |
1827 | * Here is assumed that the driver will be | |
1828 | * able to send ps-poll frame and receive a | |
1829 | * response even though power save mode is | |
1830 | * enabled, but some drivers might require | |
1831 | * to disable power save here. This needs | |
1832 | * to be investigated. | |
1833 | */ | |
1834 | ieee80211_send_pspoll(local, sdata); | |
1835 | } | |
a97b77b9 VN |
1836 | } |
1837 | } | |
7a5158ef JB |
1838 | |
1839 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1840 | erp_valid = true; | |
1841 | erp_value = elems.erp_info[0]; | |
1842 | } else { | |
1843 | erp_valid = false; | |
50c4afb9 | 1844 | } |
7a5158ef JB |
1845 | changed |= ieee80211_handle_bss_capability(sdata, |
1846 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1847 | erp_valid, erp_value); | |
f0706e82 | 1848 | |
d3c990fb | 1849 | |
53d6f81c | 1850 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1851 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1852 | struct sta_info *sta; |
1853 | struct ieee80211_supported_band *sband; | |
1854 | u16 ap_ht_cap_flags; | |
1855 | ||
1856 | rcu_read_lock(); | |
1857 | ||
46900298 | 1858 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1859 | if (!sta) { |
1860 | rcu_read_unlock(); | |
1861 | return; | |
1862 | } | |
1863 | ||
1864 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1865 | ||
1866 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1867 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1868 | ||
1869 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1870 | ||
1871 | rcu_read_unlock(); | |
1872 | ||
1873 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1874 | ap_ht_cap_flags); | |
d3c990fb RR |
1875 | } |
1876 | ||
3f2355cb LR |
1877 | if (elems.country_elem) { |
1878 | /* Note we are only reviewing this on beacons | |
1879 | * for the BSSID we are associated to */ | |
1880 | regulatory_hint_11d(local->hw.wiphy, | |
1881 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1882 | |
1883 | /* TODO: IBSS also needs this */ | |
1884 | if (elems.pwr_constr_elem) | |
1885 | ieee80211_handle_pwr_constr(sdata, | |
1886 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1887 | elems.pwr_constr_elem, | |
1888 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1889 | } |
1890 | ||
471b3efd | 1891 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1892 | } |
1893 | ||
46900298 JB |
1894 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1895 | struct sk_buff *skb, | |
1896 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1897 | { |
f698d856 | 1898 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1899 | struct ieee80211_mgmt *mgmt; |
1900 | u16 fc; | |
1901 | ||
1902 | if (skb->len < 24) | |
46900298 | 1903 | return RX_DROP_MONITOR; |
f0706e82 JB |
1904 | |
1905 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1906 | fc = le16_to_cpu(mgmt->frame_control); | |
1907 | ||
1908 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1909 | case IEEE80211_STYPE_PROBE_REQ: | |
1910 | case IEEE80211_STYPE_PROBE_RESP: | |
1911 | case IEEE80211_STYPE_BEACON: | |
1912 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1913 | case IEEE80211_STYPE_AUTH: | |
1914 | case IEEE80211_STYPE_ASSOC_RESP: | |
1915 | case IEEE80211_STYPE_REASSOC_RESP: | |
1916 | case IEEE80211_STYPE_DEAUTH: | |
1917 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1918 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1919 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1920 | return RX_QUEUED; | |
f0706e82 JB |
1921 | } |
1922 | ||
46900298 | 1923 | return RX_DROP_MONITOR; |
f0706e82 JB |
1924 | } |
1925 | ||
f698d856 | 1926 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1927 | struct sk_buff *skb) |
1928 | { | |
1929 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1930 | struct ieee80211_mgmt *mgmt; |
1931 | u16 fc; | |
1932 | ||
f0706e82 JB |
1933 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1934 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1935 | fc = le16_to_cpu(mgmt->frame_control); | |
1936 | ||
46900298 JB |
1937 | switch (fc & IEEE80211_FCTL_STYPE) { |
1938 | case IEEE80211_STYPE_PROBE_RESP: | |
1939 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1940 | rx_status); | |
1941 | break; | |
1942 | case IEEE80211_STYPE_BEACON: | |
1943 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1944 | rx_status); | |
1945 | break; | |
1946 | case IEEE80211_STYPE_AUTH: | |
1947 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1948 | break; | |
1949 | case IEEE80211_STYPE_ASSOC_RESP: | |
1950 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1951 | break; | |
1952 | case IEEE80211_STYPE_REASSOC_RESP: | |
1953 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1954 | break; | |
1955 | case IEEE80211_STYPE_DEAUTH: | |
1956 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1957 | break; | |
1958 | case IEEE80211_STYPE_DISASSOC: | |
1959 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1960 | break; | |
f0706e82 JB |
1961 | } |
1962 | ||
1963 | kfree_skb(skb); | |
1964 | } | |
1965 | ||
9c6bd790 | 1966 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1967 | { |
60f8b39c JB |
1968 | struct ieee80211_sub_if_data *sdata = |
1969 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1970 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1971 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1972 | |
46900298 JB |
1973 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1974 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1975 | } |
1976 | ||
46900298 | 1977 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1978 | { |
46900298 | 1979 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1980 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1981 | |
24487981 JB |
1982 | /* Reset own TSF to allow time synchronization work. */ |
1983 | drv_reset_tsf(local); | |
f0706e82 | 1984 | |
46900298 | 1985 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1986 | |
1987 | ||
46900298 JB |
1988 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1989 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1990 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1991 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1992 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1993 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
1994 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
1995 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 1996 | else |
46900298 JB |
1997 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
1998 | ifmgd->auth_transaction = -1; | |
1999 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2000 | ifmgd->assoc_scan_tries = 0; | |
2001 | ifmgd->direct_probe_tries = 0; | |
2002 | ifmgd->auth_tries = 0; | |
2003 | ifmgd->assoc_tries = 0; | |
24e64622 | 2004 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2005 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2006 | } |
2007 | ||
46900298 | 2008 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2009 | { |
46900298 | 2010 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2011 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2012 | struct ieee80211_bss *bss; |
46900298 JB |
2013 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2014 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2015 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2016 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2017 | struct ieee80211_channel *chan = local->oper_channel; | |
2018 | ||
636a5d36 JM |
2019 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2020 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2021 | IEEE80211_STA_AUTO_BSSID_SEL | |
2022 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2023 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2024 | if (sdata->default_key) | |
2025 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2026 | } |
9d139c81 | 2027 | |
46900298 | 2028 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2029 | chan = NULL; |
2030 | ||
46900298 | 2031 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2032 | bssid = NULL; |
2033 | ||
46900298 | 2034 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2035 | ssid = NULL; |
2036 | ssid_len = 0; | |
2037 | } | |
2038 | ||
2039 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2040 | bssid, ssid, ssid_len, | |
2041 | capa_mask, capa_val); | |
2042 | ||
2043 | if (bss) { | |
2044 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2045 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2046 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2047 | bss->ssid_len); | |
2048 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2049 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2050 | bss->supp_rates); | |
46900298 JB |
2051 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2052 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2053 | else |
46900298 | 2054 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2055 | |
9c6bd790 JB |
2056 | /* Send out direct probe if no probe resp was received or |
2057 | * the one we have is outdated | |
2058 | */ | |
00d3f14c JB |
2059 | if (!bss->last_probe_resp || |
2060 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2061 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2062 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2063 | else |
46900298 | 2064 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2065 | |
00d3f14c | 2066 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2067 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2068 | return 0; |
2069 | } else { | |
46900298 | 2070 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 JB |
2071 | u8 ssid_len = 0; |
2072 | ||
2073 | if (!(ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)) | |
2074 | ssid_len = ifmgd->ssid_len; | |
2075 | ||
46900298 | 2076 | ifmgd->assoc_scan_tries++; |
af88b907 | 2077 | |
f3b85252 JB |
2078 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2079 | ssid_len); | |
af88b907 | 2080 | |
46900298 JB |
2081 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2082 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2083 | } else { |
46900298 JB |
2084 | ifmgd->assoc_scan_tries = 0; |
2085 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 2086 | } |
9c6bd790 JB |
2087 | } |
2088 | return -1; | |
2089 | } | |
2090 | ||
2091 | ||
2092 | static void ieee80211_sta_work(struct work_struct *work) | |
2093 | { | |
2094 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2095 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2096 | struct ieee80211_local *local = sdata->local; |
46900298 | 2097 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2098 | struct sk_buff *skb; |
2099 | ||
2100 | if (!netif_running(sdata->dev)) | |
2101 | return; | |
2102 | ||
c2b13452 | 2103 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2104 | return; |
2105 | ||
46900298 | 2106 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2107 | return; |
46900298 | 2108 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2109 | |
46900298 | 2110 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2111 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2112 | ||
46900298 JB |
2113 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2114 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2115 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2116 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2117 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2118 | round_jiffies_relative(0)); | |
9c6bd790 | 2119 | return; |
f0706e82 JB |
2120 | } |
2121 | ||
46900298 JB |
2122 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2123 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2124 | return; |
46900298 JB |
2125 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2126 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2127 | return; |
d6f2da5b | 2128 | |
46900298 | 2129 | switch (ifmgd->state) { |
9c6bd790 JB |
2130 | case IEEE80211_STA_MLME_DISABLED: |
2131 | break; | |
2132 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2133 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2134 | break; |
2135 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2136 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2137 | break; |
2138 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2139 | ieee80211_associate(sdata); |
9c6bd790 JB |
2140 | break; |
2141 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2142 | ieee80211_associated(sdata); |
9c6bd790 JB |
2143 | break; |
2144 | default: | |
2145 | WARN_ON(1); | |
2146 | break; | |
2147 | } | |
2148 | ||
46900298 | 2149 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2150 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2151 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2152 | ||
46900298 | 2153 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2154 | WLAN_REASON_UNSPECIFIED); |
2155 | } | |
f0706e82 JB |
2156 | } |
2157 | ||
9c6bd790 JB |
2158 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2159 | { | |
ad935687 KV |
2160 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2161 | /* | |
2162 | * Need to update last_beacon to avoid beacon loss | |
2163 | * test to trigger. | |
2164 | */ | |
2165 | sdata->u.mgd.last_beacon = jiffies; | |
2166 | ||
2167 | ||
9c6bd790 | 2168 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2169 | &sdata->u.mgd.work); |
ad935687 | 2170 | } |
9c6bd790 | 2171 | } |
f0706e82 | 2172 | |
9c6bd790 JB |
2173 | /* interface setup */ |
2174 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2175 | { |
46900298 | 2176 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2177 | u32 hw_flags; |
988c0f72 | 2178 | |
46900298 JB |
2179 | ifmgd = &sdata->u.mgd; |
2180 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2181 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2182 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2183 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2184 | (unsigned long) sdata); |
46900298 | 2185 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2186 | (unsigned long) sdata); |
46900298 | 2187 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2188 | |
46900298 JB |
2189 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2190 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2191 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2192 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2193 | IEEE80211_STA_AUTO_BSSID_SEL | |
2194 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2195 | if (sdata->local->hw.queues >= 4) |
46900298 | 2196 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2197 | |
2198 | hw_flags = sdata->local->hw.flags; | |
2199 | ||
2200 | if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { | |
2201 | ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; | |
2202 | sdata->local->hw.conf.dynamic_ps_timeout = 500; | |
2203 | } | |
f0706e82 JB |
2204 | } |
2205 | ||
9c6bd790 | 2206 | /* configuration hooks */ |
46900298 | 2207 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2208 | { |
46900298 | 2209 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2210 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2211 | |
46900298 | 2212 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2213 | return; |
60f8b39c | 2214 | |
46900298 | 2215 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2216 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2217 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2218 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2219 | |
46900298 JB |
2220 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2221 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2222 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2223 | |
636a5d36 JM |
2224 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2225 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2226 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2227 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2228 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2229 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2230 | } |
2231 | } | |
60f8b39c | 2232 | |
79f6440c AF |
2233 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2234 | { | |
2235 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2236 | ||
79f6440c AF |
2237 | if (ifmgd->ssid_len) |
2238 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2239 | else | |
2240 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2241 | ||
2242 | return 0; | |
2243 | } | |
2244 | ||
9c6bd790 JB |
2245 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2246 | { | |
46900298 | 2247 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2248 | |
9c6bd790 JB |
2249 | if (len > IEEE80211_MAX_SSID_LEN) |
2250 | return -EINVAL; | |
2251 | ||
46900298 | 2252 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2253 | |
46900298 | 2254 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2255 | /* |
2256 | * Do not use reassociation if SSID is changed (different ESS). | |
2257 | */ | |
2258 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2259 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2260 | memcpy(ifmgd->ssid, ssid, len); | |
2261 | ifmgd->ssid_len = len; | |
60f8b39c | 2262 | } |
60f8b39c | 2263 | |
79f6440c | 2264 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2265 | } |
2266 | ||
2267 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2268 | { | |
46900298 JB |
2269 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2270 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2271 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2272 | return 0; |
2273 | } | |
2274 | ||
2275 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2276 | { | |
46900298 | 2277 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2278 | |
dfe67012 | 2279 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2280 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2281 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2282 | } else { |
46900298 JB |
2283 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2284 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2285 | } |
2286 | ||
2d0ddec5 JB |
2287 | if (netif_running(sdata->dev)) |
2288 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
60f8b39c | 2289 | |
79f6440c | 2290 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2291 | } |
2292 | ||
636a5d36 JM |
2293 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2294 | const char *ie, size_t len) | |
9c6bd790 | 2295 | { |
46900298 | 2296 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2297 | |
46900298 | 2298 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2299 | if (len == 0) { |
46900298 JB |
2300 | ifmgd->extra_ie = NULL; |
2301 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2302 | return 0; |
60f8b39c | 2303 | } |
46900298 JB |
2304 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2305 | if (!ifmgd->extra_ie) { | |
2306 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2307 | return -ENOMEM; |
2308 | } | |
46900298 JB |
2309 | memcpy(ifmgd->extra_ie, ie, len); |
2310 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2311 | return 0; |
60f8b39c JB |
2312 | } |
2313 | ||
f698d856 | 2314 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2315 | { |
f4ea83dd | 2316 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2317 | sdata->dev->name, reason); |
f0706e82 | 2318 | |
46900298 | 2319 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2320 | return 0; |
2321 | } | |
2322 | ||
f698d856 | 2323 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2324 | { |
46900298 | 2325 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2326 | |
f4ea83dd | 2327 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2328 | sdata->dev->name, reason); |
f0706e82 | 2329 | |
46900298 JB |
2330 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2331 | return -ENOLINK; | |
f0706e82 | 2332 | |
46900298 | 2333 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2334 | return 0; |
2335 | } | |
84363e6e | 2336 | |
9c6bd790 JB |
2337 | /* scan finished notification */ |
2338 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2339 | { | |
2340 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2341 | |
2342 | /* Restart STA timers */ | |
2343 | rcu_read_lock(); | |
2344 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2345 | ieee80211_restart_sta_timer(sdata); | |
2346 | rcu_read_unlock(); | |
2347 | } | |
10f644a4 JB |
2348 | |
2349 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2350 | unsigned long data, void *dummy) | |
2351 | { | |
2352 | s32 latency_usec = (s32) data; | |
2353 | struct ieee80211_local *local = | |
2354 | container_of(nb, struct ieee80211_local, | |
2355 | network_latency_notifier); | |
2356 | ||
2357 | mutex_lock(&local->iflist_mtx); | |
2358 | ieee80211_recalc_ps(local, latency_usec); | |
2359 | mutex_unlock(&local->iflist_mtx); | |
2360 | ||
2361 | return 0; | |
2362 | } |